Ab Initio study of Diels–Alder reactions of 1,3,4-oxadiazole with ethylene, acrylonitrile, maleonitrile, fumaronitrile and 1,1-dicyanoethylene. Inverse order and ratio of endo/exo reactivity

B. S. Jursic, Z. Zdravkovski, Ab Initio study of Diels–Alder reactions of 1,3,4-oxadiazole with ethylene, acrylonitrile, maleonitrile, fumaronitrile and 1,1-dicyanoethylene. Inverse order and ratio of endo/exo reactivity, Journal of Physical Organic Chemistry, 7, 634–640 (1994).